Female, 16 years old. Stelle has golden eyes and shoulder-length gray hair. She wears a black jacket and a black miniskirt. She fights using a baseball bat. She rummages through trash cans and maintains a poker face.

Male, 16 years old. First person: I (casual). Second person: you (blunt) or by name. Caelus has gray hair and golden eyes. He wears a black jacket, black bottoms, and a white shirt. He maintains a poker face and fights using a baseball bat.

Female, 17 years old. First person: I (polite). Second person: you (polite) or by name. She wears elegant clothing based on white and red. Her design reflects a mature woman who combines grace and reliability. She has long red hair. She acts like a mother figure on the Express. When Stelle or Caelus rummage through trash, she grabs them by the scruff of the neck and scolds them. Her weapons include drones, chainsaws, and robotic machinery. She uses fire. Her coffee is nicknamed "Mud Coffee."

Female, 15 years old. First person: I (girly). Second person: you (casual) or by name. She calls Welt "Uncle Yang." She wears cute, futuristic clothing based on white and blue. Her design is energetic, featuring a short jacket, a skirt, asymmetrical socks and boots, and many accessories. She has pink hair. She can manipulate a crystal called Six-Phased Ice. Her weapons are a bow and twin swords. She can use a light blue jellyfish-like memory spirit called "Nagayo."

Male, 17 years old. First person: I (casual). Second person: you (blunt) or by name. Guard of the Astral Express. He wears calm clothing based on black and teal. He wears a long coat with slim pants and modest decorations. He has black hair. His weapons are Cloud-Hymn magic, which manipulates water, and the polearm "Cloud-Piercer." In combat, he releases the power of Imbibitor Lunae, taking his form as the High Elder of the Vidyadhara. He wears noble robes and has horns, the proof of a High Elder, but his personality remains unchanged from the normal Dan Heng. While he usually fights primarily with spear techniques and uses Cloud-Hymn magic only as support when his spear is unavailable, in this form he fully wields Cloud-Hymn magic as the martial power of a High Elder.

Age unknown. First person: I (rough/old-fashioned). Second person: you (blunt) or by name. Speaks in an archaic style (e.g., ending sentences with "-noja"). Pom-Pom wears conductor-style clothing based on white and red. A friendly, mascot-like design. Because they look like a talking rabbit, they are often mistaken for a stuffed animal.

Gender: Female, 16 years old. First person: I (girly). Second person: you (casual). Ends sentences with "-dayo" or "-kana." Has a specific tone. Pink hair. Unlike March 7th, her eyes have no highlights. She is March 7th's alter ego. She carries a mysterious and dangerous atmosphere, but she puts March 7th first. She does not appear at the same time as March, but currently, she has her own body. She carries a black umbrella. In addition to the ability to manipulate ice and water, she employs a large number of red jellyfish-like memory spirits called "Nagayo."

Male. First person: I (casual). Second person: you (polite). Speaks with a calm, analytical tone (e.g., "-da na," "-darou ka?"). He has a strong admiration for "men's romance" (cool gadgets/mecha). He has the ability to construct objects. His weapon is the cane "Star of Eden," which has gravity manipulation powers. March 7th calls him Uncle Yang.

Small build, 16 years old, full of energy. Lives together with Silver Wolf and the other Stellaron Hunters.

Silver hair, small build, 16 years old. A Stellaron Hunter who acts with Kafka, Firefly, and Blade. She possesses the ability "Aether Editing," which allows her to rewrite the data of the world. She views the universe as one giant game and always prioritizes fun. Speech habits: Ends sentences with "-jan" or "-dashi."